Source code for satpy.tests.reader_tests.test_goes_imager_nc_eum

# Copyright (c) 2018 Satpy developers
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#
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"""Tests for the goes imager nc reader (EUMETSAT variant)."""

import unittest
from unittest import mock

import numpy as np
import xarray as xr

from satpy.readers.goes_imager_nc import is_vis_channel
from satpy.tests.utils import make_dataid


[docs] class GOESNCEUMFileHandlerRadianceTest(unittest.TestCase): """Tests for the radiances.""" longMessage = True
[docs] @mock.patch('satpy.readers.goes_imager_nc.xr') def setUp(self, xr_): """Set up the tests.""" from satpy.readers.goes_imager_nc import CALIB_COEFS, GOESEUMNCFileHandler self.coefs = CALIB_COEFS['GOES-15'] self.all_coefs = CALIB_COEFS self.channels = sorted(self.coefs.keys()) self.ir_channels = sorted([ch for ch in self.channels if not is_vis_channel(ch)]) self.vis_channels = sorted([ch for ch in self.channels if is_vis_channel(ch)]) # Mock file access to return a fake dataset. nrows = ncols = 300 self.radiance = np.ones((1, nrows, ncols)) # IR channels self.lon = np.zeros((nrows, ncols)) # Dummy self.lat = np.repeat(np.linspace(-150, 150, nrows), ncols).reshape( nrows, ncols) # Includes invalid values to be masked xr_.open_dataset.return_value = xr.Dataset( {'data': xr.DataArray(data=self.radiance, dims=('time', 'yc', 'xc')), 'time': xr.DataArray(data=np.array([0], dtype='datetime64[ms]'), dims=('time',)), 'bands': xr.DataArray(data=np.array([1]))}, attrs={'Satellite Sensor': 'G-15'}) geo_data = xr.Dataset( {'lon': xr.DataArray(data=self.lon, dims=('yc', 'xc')), 'lat': xr.DataArray(data=self.lat, dims=('yc', 'xc'))}, attrs={'Satellite Sensor': 'G-15'}) # Instantiate reader using the mocked open_dataset() method self.reader = GOESEUMNCFileHandler(filename='dummy', filename_info={}, filetype_info={}, geo_data=geo_data)
[docs] def test_get_dataset_radiance(self): """Test getting the radiances.""" for ch in self.channels: if not is_vis_channel(ch): radiance = self.reader.get_dataset( key=make_dataid(name=ch, calibration='radiance'), info={}) # ... this only compares the valid (unmasked) elements self.assertTrue(np.all(self.radiance == radiance.to_masked_array()), msg='get_dataset() returns invalid radiance for ' 'channel {}'.format(ch))
[docs] def test_calibrate(self): """Test whether the correct calibration methods are called.""" for ch in self.channels: if not is_vis_channel(ch): calibs = {'brightness_temperature': '_calibrate_ir'} for calib, method in calibs.items(): with mock.patch.object(self.reader, method) as target_func: self.reader.calibrate(data=self.reader.nc['data'], calibration=calib, channel=ch) target_func.assert_called()
[docs] def test_get_sector(self): """Test sector identification.""" from satpy.readers.goes_imager_nc import ( FULL_DISC, NORTH_HEMIS_EAST, NORTH_HEMIS_WEST, SOUTH_HEMIS_EAST, SOUTH_HEMIS_WEST, UNKNOWN_SECTOR, ) shapes = { (2700, 5200): FULL_DISC, (1850, 3450): NORTH_HEMIS_EAST, (600, 3500): SOUTH_HEMIS_EAST, (1310, 3300): NORTH_HEMIS_WEST, (1099, 2800): SOUTH_HEMIS_WEST, (123, 456): UNKNOWN_SECTOR } for (nlines, ncols), sector_ref in shapes.items(): for channel in ('00_7', '10_7'): sector = self.reader._get_sector(channel=channel, nlines=nlines, ncols=ncols) self.assertEqual(sector, sector_ref, msg='Incorrect sector identification')
[docs] class GOESNCEUMFileHandlerReflectanceTest(unittest.TestCase): """Testing the reflectances.""" longMessage = True
[docs] @mock.patch('satpy.readers.goes_imager_nc.xr') def setUp(self, xr_): """Set up the tests.""" from satpy.readers.goes_imager_nc import CALIB_COEFS, GOESEUMNCFileHandler self.coefs = CALIB_COEFS['GOES-15'] self.all_coefs = CALIB_COEFS self.channels = sorted(self.coefs.keys()) self.ir_channels = sorted([ch for ch in self.channels if not is_vis_channel(ch)]) self.vis_channels = sorted([ch for ch in self.channels if is_vis_channel(ch)]) # Mock file access to return a fake dataset. nrows = ncols = 300 self.reflectance = 50 * np.ones((1, nrows, ncols)) # Vis channel self.lon = np.zeros((nrows, ncols)) # Dummy self.lat = np.repeat(np.linspace(-150, 150, nrows), ncols).reshape( nrows, ncols) # Includes invalid values to be masked xr_.open_dataset.return_value = xr.Dataset( {'data': xr.DataArray(data=self.reflectance, dims=('time', 'yc', 'xc')), 'time': xr.DataArray(data=np.array([0], dtype='datetime64[ms]'), dims=('time',)), 'bands': xr.DataArray(data=np.array([1]))}, attrs={'Satellite Sensor': 'G-15'}) geo_data = xr.Dataset( {'lon': xr.DataArray(data=self.lon, dims=('yc', 'xc')), 'lat': xr.DataArray(data=self.lat, dims=('yc', 'xc'))}, attrs={'Satellite Sensor': 'G-15'}) # Instantiate reader using the mocked open_dataset() method self.reader = GOESEUMNCFileHandler(filename='dummy', filename_info={}, filetype_info={}, geo_data=geo_data)
[docs] def test_get_dataset_reflectance(self): """Test getting the reflectance.""" for ch in self.channels: if is_vis_channel(ch): refl = self.reader.get_dataset( key=make_dataid(name=ch, calibration='reflectance'), info={}) # ... this only compares the valid (unmasked) elements self.assertTrue(np.all(self.reflectance == refl.to_masked_array()), msg='get_dataset() returns invalid reflectance for ' 'channel {}'.format(ch))